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關於此問題，有一百萬個和五個問題，但我試圖對它們進行排序，但無法使其工作。我知道AppWidgetProvider只是擴展BroadcastReceiver，所以我認爲我可以在我的AppWidgetProvider中做所有事情。我讀過意圖過濾器ACTION_HEADSET_PLUG是Intent.FLAG_RECEIVER_REGISTERED_ONLY，並嘗試遵循以下步驟：Detecting whether a headset is plugged into an Android device or not.在代碼中設置我的過濾器，但它非常混亂，我無法圍繞它過濾我的頭。確定是否通過AppWidgetProvider插入耳機，拔下插頭時暫停播放音樂
我已經在我的onReceive方法中烘烤了intent.getAction（），當我插入或拔下耳機時，沒有任何顯示。當我按下按鈕時，我看到與它們相關的int常量。我假設這是因爲它被註冊的唯一東西阻塞。
我也讀了一些粘性東西或其他東西，並與此分開了一段時間，都無濟於事。
這裏是我的AppWidgetManager：
package com.example.musicplayerforburrito;
import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.media.MediaPlayer;
import android.widget.RemoteViews;
import android.widget.Toast;
public class MyWidgetProvider extends AppWidgetProvider {
public static String WIDGET_PLAY_BUTTON = "android.appwidget.action.PLAY_PAUSE_WIDGETS";
public static String NEXT_BUTTON = "android.appwidget.action.NEXT_WIDGETS";
public static String PREVIOUS_BUTTON = "android.appwidget.action.PREVIOUS_WIDGETS";
public static String RELOAD_BUTTON = "android.appwidget.action.RELOAD_WIDGETS";
static MusicPlayerClass mpc;
static String CurrentlyPlayingSong = "";
static Context cont;
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
mpc = new MusicPlayerClass(context);
RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.widget_layout);
ComponentName watchWidget = new ComponentName(context, MyWidgetProvider.class);
remoteViews.setOnClickPendingIntent(R.id.playpausewidget, getPendingSelfIntent(context, WIDGET_PLAY_BUTTON));
remoteViews.setOnClickPendingIntent(R.id.forwardwidget, getPendingSelfIntent(context, NEXT_BUTTON));
remoteViews.setOnClickPendingIntent(R.id.backwidget, getPendingSelfIntent(context, PREVIOUS_BUTTON));
remoteViews.setOnClickPendingIntent(R.id.reloadwidget, getPendingSelfIntent(context, RELOAD_BUTTON));
appWidgetManager.updateAppWidget(watchWidget, remoteViews);
}
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
super.onReceive(context, intent);
//if(intent.hasExtra("state"))
// Toast.makeText(context, "hi jimmy", 2000).show();
Toast.makeText(context, intent.getAction(), 2000).show();
try
{
String b = mpc.currentlyPlayingSong;
}
catch(Exception e)
{
mpc = new MusicPlayerClass(context);
}
AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.widget_layout);
ComponentName watchWidget = new ComponentName(context, MyWidgetProvider.class);
cont = context;
if (WIDGET_PLAY_BUTTON.equals(intent.getAction())) {
if(!mpc.hasFolders)
{
mpc.Initialize();
mpc.mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener()
{
public void onCompletion(MediaPlayer mp)
{
mpc.songIndex++;
CurrentlyPlayingSong = mpc.StartSong();
UpdateTitle(cont);
}
});
}
if(mpc.isPlaying)
{
mpc.isPlaying = false;
mpc.PauseMusic();
remoteViews.setImageViewResource(R.id.playpausewidget, R.drawable.play);
}
else if(mpc.currentPosition != 0)
{
mpc.isPlaying = true;
mpc.ResumeMusic();
remoteViews.setImageViewResource(R.id.playpausewidget, R.drawable.pause);
}
else
{
remoteViews.setTextViewText(R.id.mp3filename, mpc.StartSong());
remoteViews.setImageViewResource(R.id.playpausewidget, R.drawable.pause);
}
}
else if (NEXT_BUTTON.equals(intent.getAction())) {
mpc.songIndex++;
remoteViews.setTextViewText(R.id.mp3filename, mpc.StartSong());
}
else if (PREVIOUS_BUTTON.equals(intent.getAction())) {
mpc.songIndex--;
remoteViews.setTextViewText(R.id.mp3filename, mpc.StartSong());
}
else if (RELOAD_BUTTON.equals(intent.getAction())) {
mpc.Reload();
mpc.mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener()
{
public void onCompletion(MediaPlayer mp)
{
mpc.songIndex++;
CurrentlyPlayingSong = mpc.StartSong();
UpdateTitle(cont);
}
});
remoteViews.setTextViewText(R.id.mp3filename, mpc.StartSong());
remoteViews.setImageViewResource(R.id.playpausewidget, R.drawable.pause);
}
appWidgetManager.updateAppWidget(watchWidget, remoteViews);
}
private void UpdateTitle(Context context)
{
AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.widget_layout);
ComponentName watchWidget = new ComponentName(context, MyWidgetProvider.class);
remoteViews.setTextViewText(R.id.mp3filename, CurrentlyPlayingSong);
appWidgetManager.updateAppWidget(watchWidget, remoteViews);
}
protected PendingIntent getPendingSelfIntent(Context context, String action) {
Intent intent = new Intent(context, getClass());
intent.setAction(action);
return PendingIntent.getBroadcast(context, 0, intent, 0);
}
}
這裏是我的清單：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.musicplayerforburrito"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="15"
android:targetSdkVersion="16" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<receiver android:name="MyWidgetProvider" >
<intent-filter >
<action
android:name="android.appwidget.action.APPWIDGET_UPDATE" />
<action android:name="android.appwidget.action.PLAY_PAUSE_WIDGETS" />
<action android:name="android.appwidget.action.NEXT_WIDGETS" />
<action android:name="android.appwidget.action.PREVIOUS_WIDGETS" />
<action android:name="android.appwidget.action.RELOAD_WIDGETS" />
<action android:name="android.appwidget.action.ACTION_HEADSET_PLUG" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.ACTION_HEADSET_PLUG"/>
</intent-filter>
<meta-data
android:name="android.appwidget.provider"
android:resource="@xml/widget_info" />
</receiver>
<activity
android:name="com.example.musicplayerforburrito.MusicPlayer"
android:label="@string/app_name"
android:screenOrientation="portrait" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
我一直是這樣爭取幾個小時的時間，這似乎很愚蠢，因爲它甚至沒有那麼大的「功能」可以在拔下耳機時暫停音樂。任何指導，你可以分享將不勝感激。
TIA